<template>
  <div class="login_container">
    <div class="login_box">

      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="头像">
      </div>

      <!-- 登录表单区域 -->
      <el-form label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules" ref="loginFormRef">
        <el-form-item prop="username">
          <el-input placeholder="账号" prefix-icon="iconfont icon-user" v-model="loginForm.username" ></el-input>
        </el-form-item>

        <el-form-item  prop="password">
          <el-input placeholder="密码" prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>

        <el-form-item class="btns">
        <el-button type="primary" @click="login">登录</el-button>
        <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 验证规则 form-rule item-prop
      loginFormRules: {
        username: [
          { required: true, message: '请输入账号', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm: function () {
      this.$refs.loginFormRef.resetFields()
    },
    login: function () {
      // validate后面调用回调函数，传入结果。打印valid看看是true或者false，得知校验是否通过
      this.$refs.loginFormRef.validate(async valid => {
        // 校验成功判断，以及发起请求
        if (!valid) return
        const { data: res } = await this.$http.post(
          '/login',
          this.loginForm
        )
        // 登录成功判断，以及保存token
        if (res.meta.status !== 200) {
          return this.$message.error('登录失败')
        } else {
          this.$message.success('登录成功')
          window.sessionStorage.setItem('token', res.data.token)
          this.$router.push('/home')
        }
      })
    }
  },
  mounted: function () {
    // console.log(this.loginForm)
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;

  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
}

.avatar_box{
  width: 130px;
  height: 130px;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;

  position: absolute;
  left: 50%;
  transform: translate(-50%,-50%);
  img{
    width: 100%;
    height:100%;
    border-radius: 50%;
    border:1px solid #eee;
    background-color:#eee;
    //设置图片不可拖动
    -webkit-user-drag: none;
  }
}

.login_form {
  width: 100%;
  position: absolute;
  bottom: 0;
  padding: 0 10px;
  box-sizing: border-box;
}

.btns{
  display: flex;
  justify-content: flex-end;
}
</style>
